跨度大于2m、小于8m的现浇混凝土板拆除时,混凝土强度应达到设计强度的( )。 A

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问题:

跨度大于2m、小于8m的现浇混凝土板拆除时,混凝土强度应达到设计强度的( )。

A.50%
B.75%
C.80%D.100%

考点:造价工程师建设工程技术与计量(土建)建设工程技术与计量(土建工程部分)
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在变压器中性点不接地的放射式电网中,可以安装选择性漏电继电器()

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A patrol team of sea lions and dolphins featured in a large-scale military exercises being conducted by the U. S. and its allies in the Pacific Ocean. The machine (1) took part in simulated mine recovery and mine detection missions during the biennial Rim of the Pacific Exercise (RIMPAC) war games. The (2) started on June 19 and will run (3) Friday.
"There are a number of mechanical systems that work in those areas. (4) high-tech gadgets deployed by the military can’t (5) the natural skills of dolphins and lions," said Tom Lapuzza, spokesman for UN Navy’s Marine Mammal Program. Sea lions have "incredible good underwater (6) " and can dive down to 300 meters to catch a recovery line to a mine, he said. Dolphins use sonar to (7) mine.
Human beings have a long (8) of training animals to join the military. Horses have been the most widely-used animals (9) the recorded history of (10) . In early times, horses were used to (11) chariots or to (12) armored forces. With the development of modem weapons and motorized (13) , the use of horses for military purposes fell into (14) . (15) , horses were still used (16) by the German army during World War II for transporting (17) and equipment, including artillery.
During World War II, (18) with explosives strapped to their backs were used as anti-tank weapons. In other (19) , they were used for detecting mines. Some dogs were also used as messengers.
Other animals have also (20) in the military. Recorded history shows the use of elephants for military purposes as early as 1,100 B. C.. They were employed during World War II by both the Japanese army and the (21) .
There are records showing that over 100,000 reindeer were used by Finland to tow sleds during World War II. They carried the (22) to hospitals, brought supplies to the troops and moved heavy anti-tank weapons. It is well documented that oxen have been (23) used in war as improvised beasts of burden. During World War II, spiders were employed by the Allies to spin silk for (24) in cross-hairs on bomb scopes and other optical instruments. People also are finding that Vampire bats’ ability to use echolocation is very interesting as we (25) to learn how it works and it may benefit the army.

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恒温、恒压下,在一个容积可变的容器中发生如下反应:

若开始时放入3mol A和3mol B,达到平衡后,生成C的物质的量为()mol。

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无论在何种礼仪中"女士优先"是一个普遍的原则,下列不正确的是:()

A.当一位男士与一位女士见面时,男士应先伸手示意握手,以示尊敬

B.在用餐时,应先为女士服务,再为男士服务

C.走路时,男士应在外面以示保护

D.走出电梯时,男士应让女士先行

题型:单项选择题

下列选项中,属于建设项目职业病危害预评价报告的内容的是()。

A.对建设项目职业病防护措施的建议

B.职业卫生管理机构设置和职业卫生管理人员配置及有关制度建设的建议

C.职业病危害预评价的结论

D.对建设项目拟采取的职业病防护设施的技术分析和评价

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